Weather in Bay Saint Louis, MS
Updated 2026-09-26 09:00 local time · ZIP codes 39520
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
75°6% rain
77°10% rain
79°14% rain80°11% rain80°13% rain80°14% rain80°14% rain80°14% rain80°14% rain81°14% rain
80°15% rain80°15% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 15%).
It feels like 77°F with winds near 7 mph.
75°F, 6% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 21 mph.
Current temperature is 75°F, wind 7 mph, rain chance up to 15%.
UV index is 2.
Local weather characteristics in Bay Saint Louis
Mississippi has a humid subtropical climate with long hot summers, mild winters, frequent heavy rain and a notable severe-weather season.
Bay Saint Louis is part of the South weather region. The forecast point is near 30.31°N latitude and 89.33°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Bay Saint Louis weather today
Sunny and 75°F in Bay Saint Louis, MS. Today's high is 81°F with a 12% rain chance. Winds are around 7 mph with gusts near 18 mph. Relative humidity is 69%, pressure is 30.04 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Bay Saint Louis
Sunrise is at 06:47 AM and sunset is at 06:49 PM. Tomorrow's forecast calls for Sunny with a high near 86°F and a low near 75°F. The maximum rain chance is 7%.